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Post Info TOPIC: GMC/Homelite 1Kv Generator AVR


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GMC/Homelite 1Kv Generator AVR


1Kv GMC 10.JPG1Kv GMC 8.JPG1Kv GMC 7.JPG1Kv GMC 4.JPGLooking for some technical in put. Have a GMC/Homelite 1Kva generator with a faulty AVR module Have replaced the blown IRFS640 Mosfet & checked the 2N5551 transistor which is ok. It still wont work so I cracked open the resin from the PCB & tried to draw thecircuit to the best of my ability, some resistors broke so cant measure them. Surely there is a retired Electronics Engineer here who can tell me if my circuit is corect & likely to work, & what the value might be of the resistors which are unmarked, or any other things that might be wrong. I am keen to rebuild a regulator as there is only about 20 parts in it, & cant see why they are worth about $200. Have included voltages to the rotor under various loads by forcing the generator to work, by rectifying the 90V ac & feeding through a 40Watt resistor to the rotor. At least this proved the generator works & the AVR is faulty.  Help!!!   Daryl

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D.L.Bishop


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Just noticed C1 should be betwean R1 & R5. Daryl

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D.L.Bishop


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1Kv GMC 9.JPG1KV GMC 10.JPG1Kv GMC AVR 6.JPGSucsess at last have posted the corect & fully working circuit for the AVR unit. The easies & cheapest way was to remove all the parts & start again with new parts, only parts re used was the large cap & trim pot. If to was to replace all 24 components the cost woul still only be $14. So realy happy with the results, The C1 capacitor was also faulty & was only 16V rated so was replaced with a 35V unit as there is 18V across it.  Daryl

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D.L.Bishop


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1Kv GMC 12.JPGThe final result, the AVR unit is now mounted  in the black box under the fuel tank & bolted to the front panel as it wont mount inside the end on the generator now.

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D.L.Bishop


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Well done  .... 

Just noticed this post & was about to mail it to an electronics guru mate. 

Won't have to worry him now. Though I'm certain he would have redesigned the circuit & added a  range of bells & whistles.  That is if it ever got to the top of his list or grabbed his creative attention.

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See Ya ... Cupie




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Good on you for sticking with it most people would dump it for scrap and get a new one . I have 2 of them in the shed .. both go .. The way to go..fix it its more fun..

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Land Rover Discovery Chipped TD5 Manual ,Air Springs, Anti Sway. T.C.
Auto level. Van, Roadstar 21.6 Voyager 4000 all sola powered.



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yes.... well done on fixing this problem, and great to know so many others are keen to help.

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Life is but a day.... a fragile dewdrop on its way


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Redtails , That car you have there needs a little bit of paint and it would be a goer.. It also needs some air in the left hand tyre.. Other than that it looks good..I see the air con is working well.........

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Land Rover Discovery Chipped TD5 Manual ,Air Springs, Anti Sway. T.C.
Auto level. Van, Roadstar 21.6 Voyager 4000 all sola powered.

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